My wife bought herself an Osprey backpack. It's specifically for women's size bodies. She didn't like it, so she gave it to me. It doesn't feel too small on me, but I'm not a very big guy. It has an internal frame which makes the pack feel heavy. But the ergonomics are so brilliant that once it's on my back, the weight disappears. No wonder these things are so expensive. Let's see how it holds up. I'm pretty impressed so far. I have to walk and ride around wearing a backpack with a somewhat feminine shade of purple, but I don't mind.

I had a Timbuk2 backpack until recently. It was very lightweight, but because of that, it was very floppy when not on my back. The floppiness made it difficult to pack. I'm surprised at how much of an inconvenience that was. The pack started tearing after two or three years, so I guess these things don't last long. But I got it at a very good price, so I got my money's worth.